Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0419621b66ad522020149944751da152e467096e1026e9897e4c3aeeb44d122' 
  AND token = 'WzAtQ4QaFblzUF72M5aGMGQq98qKrZ7TThalWqkEnqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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