Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '249464bffd35306a23644e68d269eb3f73bfb2df16b4d316a1df70e1d3233f43' 
  AND token = 'otLEeFf3iD5sNY+Hb1beu1zXcKZIuqGV6wlSUwzwwaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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