Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '156dd310206327e5693e07b25920fc5416a64ff2403b2bee179015726a700327' 
  AND token = 'vaoTNZ6w941UmYuKeVw6guCr/JlIDFCf8ZKMX0Z5PJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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