Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74aac40a4ee429b6c6ab1559f58640140210ff4b5b263da64e1c49c80f419999' 
  AND token = 'YQxa/WxKSL6TmrR7222CXjcqaCX54OSHUPG2/X2wjzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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