Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3091754da41576aece10f580522bddb5a9789716fac9f16fb98dd2fb712b1b74' 
  AND token = 'zcHqHO2lPyBKdnY3W3KJmixf7MKzwLmqN756kP3srsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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