Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e63376eed69d55feda63a9864175dc31c1c59d940e9959b191334422041df457' 
  AND token = 'pSv/btUeCAXFTmDE5BLXKyCEQUuMoLJbwZh/m9KIMOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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