Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87f98fa9dde6c08d4e084cda0bd9fde97c480eb2a130c0f46c012259208fffdf' 
  AND token = 'dyjFfhG90+E9A+Gcqhj5Vis+8gKXBWOa8UbpfbUOfV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}