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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dd97c9a9f16d084bd32c254832fd60b5992217c9e0eefd8faf31c1666446355' 
  AND token = '/gh90lwtc/W+CMsFPWA6R4kocPIt6ntP9LT5FUwnf9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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