Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '858e472b2d2b66c4d203abf957070bcb06512824d8bcd6e99adfb87855be8c5a' 
  AND token = '/L8XPf4lrW+Skv3IQkw6udTSlxNuf0ntfwND+IKQiPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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