Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6259eda9c12612701694b80bea9906834ee62acc52d649807d010892fa2bf3b' 
  AND token = 'tEO90MW2eJBH+iuEL1dLU1YnoUeX9JFxbFh1sIuIP48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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