Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '779f2094617683cf5b3b1c06ea41f4570adfaec9228b5225c490f36f7998250a' 
  AND token = '1hUtsqnK5SqfLIoak2bGyjRH4TOYrFIKfsd8nOyDX3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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