Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '697f431c0c753401820406bec34a8d8b5b324c7df1dd1856e484b0158ece1577' 
  AND token = 'jI/UmFKABd9Jx7K7WyIHqZ8fk2kPvsWvBTkv5VtWXT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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