Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd228e191e4087c7e4e0f68ec5d91876ec19763d28cd77e653807f5374c3d6b8d' 
  AND token = 'CRljFXjcd0UUKIo79D2goTXGKCSgISrlcuf6w7PLt1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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