Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9901d76a118bf08258e14705701672ac441a1f43e1d29cd2dcefbef339311edc' 
  AND token = 'yLQ8jruFeE+FI20KkmXq4ppi54EhoKM2JYBlrlWHAhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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