Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4430d65a505a7919ad4bd2a7507da81ae66fde2f23e50c76fe4db40eeaa01ad7' 
  AND token = 'goqw1BkSNIj7wYbaMhH3MldEfkEpFRdZ2ZZYqvRMLiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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