SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12fb3560f8abefb33691a0788318ba8f68cfae81549d83cc8bfba3c7722d0105' 
  AND token = 'sR6rwWkzSYYxBMh3YNN/e3R7FAuUJgOvKKg2hjcpHk4=' 
  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"
    }
  }
}