Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f05ba302e0eabb1284fe4d0fb29f7caa5611f773f7aaa1dd35675f810778984' 
  AND token = '1dgDgwEsnPMLgOFzIAKsk3v+0/fS74pAtbhjiPW/suA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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