Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96ced84b3af4e8bc221025c10cf00be44419a972dcc6e00baede2c11111121c6' 
  AND token = 'ccWV8OCpg/JHSwVqKto2H6rsOs4txDf/YIxgYq/6G0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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