Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b49fc834faf75633beb408ab1ce841a92b5e4d52885496166887421264bf310f' 
  AND token = '44sLcP6fhIKSPOc1NkEKRb8n8xf1ahUVZdDzjVLabJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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