Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0998e490aed9fee8bfbc2ea77b5f62826f7758a18312127a40f4840beb3a66b0' 
  AND token = 'gNVL7hWXSqag9TMeOBxdpGXPxqkKBkc9hw39sGPO7fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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