Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fb3b638d1428b027b5c5f64626549adce1a9429ec79c5b51281f0dc5ed17b8f' 
  AND token = 'sr1rLi/AtoTmL6D1M+OVSJ7L9JZ579hMoybcYPFpUqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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