Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '503b72696da447cffcca33b07347b64b3deddc24db0022b16a72766675c6d473' 
  AND token = 'XOuO0rw5Z0jP7FmTNvNW6vXrr9YmkrLW8Ut3Cppxu+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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