Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c0c77ab881305e790d9149732dd7a5ed300f230938fbd32587eedf7ffd63f4a' 
  AND token = '7/Co11JzbhMGR29SyH8DO5Hd4OIMZET7LWTwd50jlUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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