Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad727b1847de764b6a66aa85c966396535685ed7ba4777369399d085f5084c49' 
  AND token = 'X45WAii/2BXeVYU24lT/jKDRzsJG/s8cF5FUaDQz/4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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