Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '075a84287132880eed2e0f56b675a3140394f2749fa70e20b7e566a5e87522fa' 
  AND token = 'RI9QLnd0rNYdbTvCWR+nNTZ6qSuLty8EW/cTzpcIyU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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