Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3dbfd18b35ff558d086cc58f008081ff0818e0bad469a672353bcceeac785a3' 
  AND token = 'e/6sco8rA9Yi+sIK0jnoM0U3894KwIC85B/5vuXXX44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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