Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccc70e0993e22356b46f06356f1dfe6e55e2cbbe526a13de4a6e2c605f812335' 
  AND token = '/oa0jcGsjYwq8qlyOoVm7GNWNRjcmAV/tNzprclT0Tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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