Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '8c3d86e0295e239e1b9845f5ebedcf52264529efe1299f021d5e6b2c5171367b' 
  AND token = 'f6cam5oBoUt/16Coew5Etbkr7/Ms4YE1x9/vD7/Uep4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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