Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d740c38d5385d6298a4f149bf1f0c83429aec54e560f8e179759c54e9c35d2e' 
  AND token = '9CSDrqIpYO6XkhFyaatR0v6wBIpRN1L8yGxEKoIK/PI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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