Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '78208886a82c81480a28ee64db21bf40f76ae676acad77b7f3e51baa877ae3ab' 
  AND token = 'wx1WPh+VeU4qlZzd1nQjjoC0RGXT+MgeyFpgP86IQf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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