Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b3018a39e44d9e80ce6b5e57f8b6b79bf6d3ecf5d7ef969ed58e9f48e264e93' 
  AND token = '/4uaYkeCOEzuMi849pixDCkU9ZtC7xEPDQVDEJ0o0QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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