Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '67fac99919809a0bfada6f1514a89963ca2f1722b2b5d6fffc31e60d1f728e57' 
  AND token = 'THsWuBc+rniTYI2zcEerB9/rsSuDjA5gHwT+q2aFLkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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