Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8ad0c5a95f09404bf09e7c3ec32b08f4bf543ee2c34431ecefbe605301f6bfd' 
  AND token = '8PCWskBuhu+CiUnLFCyCDcYPMOGy6UtAvU/wCi/iYQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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