Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77bb1fa3dba465bb1198c2c697a11800f58f49f8f09cdbc4065fdb0538611a0f' 
  AND token = 'AFvIZFTVHV/92zc64NRSy0rZSgwecS2BoQkt5psJNUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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