Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ce51cac1b3bb490f01f8c7f1eadca2fb7c07d984b30a656eb46f828c227f967' 
  AND token = 'e31Y7dOKFPGkPU0ZQWsGrXyhfLHyAa4YbvhiBk1upSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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