Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '836d6e93075cdad49d64758957688377465d5fde58d7bd9208a30269475c3339' 
  AND token = 'EU0kHWx6sl+aduEc5FNwrLLUA1hAZv2Se6RyAieyHtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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