SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f6f383b4d3bb6a135dc2a13eeff65bcd4e969c0358bafd25eaf1acb5b30054b' 
  AND token = 'jR95XBH4UhlTlBp0HpvYiCKZDB17RwXg5Yq51ooG4As=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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