Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c41ec07c480b9f5822945810895036cebd28f690b2e3a8e315bbe030080724c' 
  AND token = 'nIw7Eg+nk0t1Ibjeu1fBZvstyuPROO+ZwIkDDULU22M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00123

JSON explain

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