Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17da6ed462aee6f4ae32d8ee6440711403180d79fad3f7861eebcaaca9f73623' 
  AND token = 'Vq42RSXcrDy//BTzMuElPQEqGCP7Hpxp5zPGORF5uc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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