Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5135e4a104eabddba46cc20f745b05399e08a7cb692103be4d7a1c13568db75' 
  AND token = 'Z1bH5vLc71zM5X1tY9v1Jm2OHEavMTeRu6xEjQ/HErI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}