Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91904fd4826fb502adbdd45b56d30e3d2b3d0b305cbbcc88af0222b20f535ac7' 
  AND token = 'MicZo2IXFboT6CK2Z4YooZIZgrQVj4GS4u4XWb5I+V4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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