SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '673de24cbd3ebfe4655c8b5464319ebfbefa09843c81f768b06490142b364aa5' 
  AND token = 'QvJIp1fnLBzlImaSsSXgthUsgjTJyUWotJTBT0G0Kf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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