Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebaeb4779739e828b0338d19fdb500e0beb0a1163badfd0227602d7e4f36b042' 
  AND token = 'PFI1ZCtOLUw8kACQi9KrBFE1lmkmI5gbNGvGWtIIOvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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