Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17efe362312315e4a5265cdab5f167d46fa8af414c8e6a12654ebaf7ca9add63' 
  AND token = 'ds5q284j+7G8z5aFhea5Edv2HsiI8V5LbEwnbbIVl48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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