Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2effbccc439bebead4925dd1f32354a622c0613867312e16f2f0c511575816c5' 
  AND token = 'CA0DEmGCsr2O/MCeIPR7XgSo+Zft6an0OGBtAw0lKs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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