Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0502279d534039aaf0fe323e53a12fc13a0a73cd189f78373dd17173bfe6dfdd' 
  AND token = '6c76AjRCynueF2RYK2JZ22lW/gFUl7E9UOebfnB9M7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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