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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82e96f094a12e775e269807ae9325050df95483c32934f47a2f36ceb5345d89' 
  AND token = 'uoU6YNrRPnBj8qryece73YCfBiIwyFhp1tDi9JgD3ZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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