Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d984f1d8e563bd9189930fcac264a38e22063b129d01503dd6000230cd2936a' 
  AND token = 'nrYj/WJzWpySihS0VEDb0Q3/HPRMAMgaC0jzJwZkycM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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