Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '782295777cedf5afe069d16d126719892003a51514d3e7f17f36e8928da43ac3' 
  AND token = 'tdRnrYCPoKorgt0NZieoGYJdYqe790Z574V/juIr1ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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