Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b02b6f2ad67eae9c0af30c102bda297a3d22c53d971f4fc31ac4722a7e454256' 
  AND token = 'ILkkKVBUzOhVU527hIWj51t5FVMErxbLSKf3r1lLRV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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