Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '797b7cb370af319ed903a973ba87894800af5701ddacab3c3f3164ab7e73e5ef' 
  AND token = 'HY7jelh45w3XH2emMv0IQTkNrdm5rLeLSkgF/caC138=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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