Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4515a54de7128faa594ab6784bb5c895692b5164387ae1a079074e3f80ca20e2' 
  AND token = '4v2dTAl1AUQ/kyMo0egK4A3kaiGykcKMZNDxk8YIRkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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