SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7a451ab522793d6229f258aa94fd2e5066d3bacbd3d0f0bd926e7583474cf3f' 
  AND token = '1RkQu4vvP7RU+7v/hBOOA983xg0qub/OYkqxBShYclQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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