Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3e8a99ea525ea7fe7c978641a5a4d50731ad8e7bc8a10e74359011c2d7cd483' 
  AND token = '6d9Se5YbpJZm+zA4nChGjm50n6vbUHuDfcSlbXzeE14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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