Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2997bbe0ce9994eb9e950f426838a6fae40c47332d6c111857221eb87a939ace' 
  AND token = 'ns9HZFxESyYSndKFbFLcQTVhT8egfxfHdN4TbtHCTEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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