SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ae2dc649f9d6ec3f372a314c016a62300f38516f8c2478a43913ef5e21a7fff' 
  AND token = 'ZPJWov4+JRjZirr5uGs/HASplCXJziAKSSa9s83v8Ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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