Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68e4b54abdef8f9716bfbeab704e2f8646f88f3ffaa9aeebdbb8f8dc3e62dad4' 
  AND token = 'kEq54IWSGwZg1ieK7EOUlQ7Rp+WdLjwj/OYC4D1m6xU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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