Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75100ca9320ba49698049d6926925e8d34e36e03679a8e523c3df2971e7e9964' 
  AND token = 'KUpFAq3v9QFp2vQZh28P6ugUCGodF4v+BQlsrgSla/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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