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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '483018b7cb18604da628866e6b5da66384e2bbeb1627520868925b40df99f368' 
  AND token = '5EKJQGDjG4kls/M1Sd3bNu9LzqC5V0TfnGCfjP5+F1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}