Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2ff10697cb2001143fe7a5d7fcbfa748a11a06bf5e75cdf0a899460766bcbaf' 
  AND token = 'qGUnh4URfGHylq67MFiebMeeh6QHZw10o5QbdeYxCRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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