Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6114fe914bcdc8bc3a1b2c75a4a07b90e31e34f142e26d076e29131af968b726' 
  AND token = 'J/7Iosyjy89cyPgTVtI/BuUDwdpiE5147lUkF8XYap4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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