Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6669d7850d77b8b7f178a77cdbdef1b318d10cf36bc846b580a2affcbfb512d9' 
  AND token = '+jltT1wC2kBRig4tyRfwqQY8aYBtB7BuVeOXdH18tE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}