Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2e998c2aa4aebafda6f1337541a0b1ab890e3404fef5f4808520a91ba3071cb' 
  AND token = 'hyTn9+KT9SBt36SZj1IHJJ+o04h8SpOhSgI/tjScX4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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