Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcfda93fa63d5e6f2d59b982de3b7d25d98f037050873a7e1e5f5bd2f59405d7' 
  AND token = 'nxWWRIBRseRVQvfRMNxtja1bjWCseWRJ5Jbyb3SXLXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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