Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de5a9ca4127ae292cbb81a876ff694520dd80e6c9a037833f44526991aac9d2' 
  AND token = 'Tqa7IUg6sTpBNGRVRhRSO9Ty54S8//zgfuqYPqz0Ucc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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