Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6a728cb48122e4adea1b62bf1c476b5e495bab17e962b03cd04598b55f43c85' 
  AND token = 'XytDTWgitKutXrVcCyrK5FNgfcsp1Xmcf0FxWR0xc6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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