Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d021cf08e3eadf6fbd27a2bd00ddb084adaa8b40fb6ce7777d17e99185d758' 
  AND token = 'sYFWnJ8Kcn4eKodDN3OEkKDZr0koOXQwTFwaDG4n/Ng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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