Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd33f5c99a48006fadaed05864199c93edd55c72532d812278497f1552d18b6f2' 
  AND token = 'd3ZMVaix8Fi0hH+Pe70X5dbZJmtmZ/DhviiAgnQuavA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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