Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b171b7a9d5fb45ffa44f064e90e712e7b9139310aba88694fe10e6adc35ed9d' 
  AND token = '2n30hx1m9NkQdKGzSfgRG8wWV1xNFO6UeLWZwkvrSDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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