Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'de5b4a05ba295802b3295e950adb02c51b2dc214fd064eda82c2bcf6f9b9a116' 
  AND token = 'Hds+/uEqULwpwh4WNd4ol0KYUW/9xC85wa6jEvwPg80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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