Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86f1a1becc6526fd537933e2d7bebe27653d2835e6ddf605313366c5a7d4858f' 
  AND token = '7CkQxCsS6lgRv+nJGiLA4KFS8fIYDp7xpqZ9CfGr2CY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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