Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1492c7c8bffc7d3fc6b1d8af4e5842944428c8cdb14ea1844329e8b86f3ddc1b' 
  AND token = 'pwUWlcvhg2+SAK9uRmi7Mcudrb/xwiaQ0PiZEOhW75Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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