Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96d95882331802e52ee15002201e8a70bf84ad46581fa7c0f93bae821ee8537f' 
  AND token = 'XeeS/ttMaX00d/aIAIn0K7JNX0ZBfYfcjkzKfvNyvGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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