Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fad87beddfdff08a8dfda40833eef03259ace2e68f9bc8cc5e34c84d8dfc995b' 
  AND token = 'FkN6UhaQnYRs5VeqqZzb0zxecpoyP+ilRARMTNWukLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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