Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee36770d9f57a2cae92cd94ee233e4f4f7a7f59b5d2c4f4a48de0ed5204b73c2' 
  AND token = 'vyeROZJEL47DDlWaLo+1PqvkZQMbfmGcS45SfUdZvJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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