Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23402e2f15576681849f2743ea129b9f612ec3c3b57005e7dc3b84360089b91e' 
  AND token = 'Dw+Al7grIaqp44wmreZSKESKgMuOT+FFFElBerGf944=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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