Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b70bda7e26214d1b55532af9ab76fa5450939e17924e5569f7ce4b9b501178b' 
  AND token = 'mynNIw318uwNVWjaJqXV6CbNuPq86u1HCC1UP117uMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}