Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34d21b657a5277b4cf2c60279c2ae3cf8dc8f6f380c635fb224203ace510455c' 
  AND token = 'ixacxTV7mZAP2rVnfeWr53aYteAjDrvR+WdIc/0ls/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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