SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa1b081d717c6cf14c8fcad7baa10b562647677cbb14a153b884df87dd93cecb' 
  AND token = 'zpG/j5UKcjwM4iYOBaPfVHQwpJpTGe+n5q86THB5h5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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