Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40d2a4575c7ee1cfc77592b871a5cb54c3b5cd6252e2db8b061eeb7eb19d2e47' 
  AND token = 'wxJ3pulBxPZs0I8QnAc/tUi0WtJAZ8ZLAAO7SFo7xG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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