Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec06f67f2d9a75781ecf2a5f4e233257faeedd70cdcc206fcc9cfb4275f7f1b2' 
  AND token = 'nKrtqW8yjwN1D4JedHgD4Am5Oh9311Wxyll6BH06k1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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