Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25f8aac1e2978cc15db4170e13f0c482a29776e564e9426735b415d25e676fac' 
  AND token = 'usPaLfkarh9wMBozTUFBslw7MqsSXGIIOL0nJYEYS6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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