Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '366631564b5d93750a3d310710b7ade2ae86409c9d7f93bea00dc32bd9d7267e' 
  AND token = 'yMFjRSqvUzcTr/CvCGphdJm2HagDIsTmnG3C3Um8EM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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